IRCT20090301001722N17 IRCT 2018-02-09 Tehran University of Medical Sciences Ipsilateral Sacroiliac dysfunction among (Right/Left-hand drive) taxi drivers and effect of sacroiliac belt on muscular activity during sit to unilateral stand task. Ipsilateral Sacroiliac dysfunction among (Right/Left-hand drive) taxi drivers and effect of sacroiliac belt on muscular activity during sit to unilateral stand task. 2017-09-15 anticipated 80 Complete https://irct.ir/trial/1219 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Diagnostic, Randomization description: The examiner will remain blind about the low back condition who will perform sacroiliac provocative test. During EMG, the investigator will also be bling about the side of involvement of the sacroiliac Joint and low back pain, Blinding description: The examiner will remain blind about the low back condition who will perform sacroiliac provocative test. During EMG, the investigator will also be bling about the side of involvement of the sacroiliac Joint and low back pain. N/A Sacroiliac Joint Dysfunction. Intervention 1: Intervention group(A): Before Treatment; EMG would be performed on this group before the application of Sacroiliac belt. Intervention 2: Intervention group(B): After Treatment; EMG would be performed on this group after the application of Sacroiliac belt. Intervention 3: Control group:Based on methodology, EMG would be performed on this healthy group without performing any treatment. No - There is not a plan to make this available Justification or reason for not sharing IPD is As per consent form, Researcher was obliged to keep the participants information confidential.